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官帽舟水電站廠用電系統(tǒng)保護定值計算與整定1、問題提出2017年7月28日,官帽舟水電站廠用電Ⅰ段因主變檢修配電箱外接施工電源線路發(fā)生接地故障(可能為單相或兩相接地故障),引起1#廠用變保護低壓中性點零序保護動作,造成1#廠用變高低壓兩側開關跳閘。從保護屏顯示看,零序電流值3I0=2.375A。這是一種越級跳閘的故障現(xiàn)象。具體情況本人在下面進行詳細分析,并就電站廠用電的保護定值提出具體解決方案。2、已整定的1#廠變高壓側保護定值已知參數(shù):1#廠用變容量:630KVA,高壓側電流互感器變比:100/1,變壓器變比10.5/0.4=26,Dyn11接線,變壓器中性點電流互感器變比:400/1,1#廠用變容量額定電流(高壓側)=34.6(A)。低壓側額定電流=908(A)。低壓母線短路時高壓側電流值:Ie(高壓側)=34.6×(1/0.06)=577.4(A)低壓母線短路時低壓側電流值:Ie(低壓側)=577.4=577.4×26=15011.5(A)廠用變歸算到低壓側的動作電流:速斷保護動作值:7.42×100×26=19292(A);可見速斷保護只保護1#廠用變的77.8%。過電流保護:0.83×100×26=2158(A),跳閘延時:1s過負荷保護:0.43×100×26=1118(A),過負荷報警:0.9s,跳閘延時:6000s(屬未整定)。低壓側零序電流保護動作電流:1.36×400=524(A),動作時限:0s。3、珠委設計院在負荷開關柜上的保護整定值(1)進線開關過載保護:0.86×1250=1075(A),短路短延時保護(反時限I2t):5×1250=6250(A),接地故障保護:0.3×1250=375(A)。(2)重要的負荷出線開關保護整定值:中控室動力屏:過載保護1In=160(A),短路短延時保護(反時限I2t):6×160=960(A),計算電流:90A;直流屏:過載保護1In=63(A),短路短延時保護(反時限I2t):6×63=378(A),計算電流:40A;消防泵控制柜:過載保護0.8In=320(A),短路短延時保護(反時限I2t):6×400=2400(A),計算電流:234A,電動機額定電流105A;通信室動力屏:過載保護1In=100(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流45A;滲漏檢修排水泵控制柜:過載保護1In=250(A),短路短延時保護(反時限I2t):6×250=1500(A),計算電流198A,電動機額定電流:100A;2#機組動力屏:過載保護0.8In=200(A),短路短延時保護(反時限I2t):6×250=1500(A),計算電流:160A,電機啟動電流:100A;技術供水泵控制柜:過載保護0.8In=504(A),短路短延時保護(反時限I2t):6×630=3780(A),計算電流:423A,電動機額定電流:140A;主變檢修動力箱:過載保護1In=100(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流:54A;電纜層照明箱:過載保護1In=25(A),短路短延時保護(反時限I2t):6×25=150(A),計算電流:4A;電纜層檢修動力箱:過載保護0.8In=80(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流:54A;空調電源:過載保護1In=100(A)短路短延時保護(反時限I2t):6×100=600(A),計算電流:60A;電動機額定電流:60A;中低壓空壓機控制柜:過載保護0.8In=80(A),短路短延時保護(反時限I2t):6×100=600(A);計算電流129A,空壓機電動機額定電流:55A;蝸殼層檢修動力箱:過載保護0.8In=80(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流:54A;水輪機層照明配電箱:過載保護1In=25(A),短路短延時保護(反時限I2t):6×25=150(A),計算電流:4.7A;水輪機層檢修動力箱:過載保護0.8In=80(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流:54A;1#機組動力屏:過載保護0.8In=200(A),短路短延時保護(反時限I2t):6×250=1500(A),計算電流:160A,電機啟動電流:100A;送風機室動力箱:過載保護0.4In=40(A),短路短延時保護(反時限I2t):6×250=1500(A),計算電流:40A;電動機額定電流:22A;母線電纜層照明配電箱:過載保護1In=25(A),短路短延時保護(反時限I2t):6×25=150(A),計算電流:0.8A;母線電纜層檢修動力箱:過載保護0.8In=80(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流:54A;1#主變電源電力箱:檢修動力箱:過載保護0.64In=64(A),短路短延時保護(反時限I2t):6×100=600(A),計算電流:36A;電動機額定電流:20A;軸流風機動力屏:過載保護0.64In=40.32(A),短路短延時保護(反時限I2t):6×63=378(A),計算電流:20A。4、ABB開關說明官帽舟水電站使用的ABB開關型號有:E1N、Tmax系列。在廠用電配電柜中配PR122/P-LSIG、PR222DS/P-LSIG、PR221DS–LSI電子脫扣器,配電箱中的開關為TMD熱磁式脫扣器及固定的10倍瞬時過載保護。Tmax塑殼斷路器常用規(guī)格說明:如“T2S160TMDR1253P”中的:T—系列;2—框架號碼可選系列(“2”屬框架的額定電流≤160A);S—分斷能力,S:50kA;160—框架電流可選,此時框架電流為160A;TMD—熱脫扣保護,T可調(0.7-1*In),M不可調(10*In);R125—開關額定電流In;3P—開關極對數(shù),3P即三相開關。電子脫扣器說明:L-過負荷保護,S-短路短延時保護(當8In時可為反時限保護動作特性),I-瞬時保護,G-接地故障保護。5、0.4kV廠用電單相接地電流計算以下計算假設:1)計線路電阻影響,2)不計發(fā)電機勵磁系統(tǒng)影響,3)由于只用于保護校核,所以不計異步電動機的影響,4)假定系統(tǒng)無窮大,5)不計電弧電阻影響(即認為是直接故障),6)忽略設備的電容、電納,7)認為變壓器為標稱變比,8)忽略開關等分斷設備的壓降。單相接地計算公式(以A相接地):IK(1)=IK(2)=IK(0)IK(1)=IK(1)+IK(2)+IK(0)=3CVnΦ/(Z∑K(1)+Z∑K(2)+Z∑K(0))式中:VnΦ:相電壓,取短路前電壓,C:電壓系數(shù),大系統(tǒng)是為1.05,小系統(tǒng)取0.95Z∑K(1)、Z∑K(2)、Z∑K(0):系統(tǒng)運算正序阻抗、負序阻抗、零序阻抗。由于電站計算的短路容量遠大于廠用變壓器容量,故可認為針對廠用電系統(tǒng)而言,是接入無窮大系統(tǒng)。假定Z∑K(1)=Z∑K(2)。由于400V母線較短,忽略400V母線阻抗的影響。查得:長引水電站廠用變壓器參數(shù):Uk%=6,Pk=5960W;生態(tài)電站廠用變壓器參數(shù):Uk%=4,Pk=3470W;計算公式:RT=式中:RT—變壓器相電阻XT—變壓器相電抗△Pd—變壓器負載損耗KWSn—變壓器額定容量KVAUk%--變壓器阻抗電壓百分數(shù)Ur%--變壓器電阻電壓百分數(shù)Ux%--變壓器電抗電壓百分數(shù)Un--變壓器低壓側額定線電壓,為0.4KV長引水電站廠用變壓器的計算阻抗:RT=2.4m?,Ur%=0.946,Ux%=5.925,XT=15.05m?。由于是Dyn11接線,所以:R(1)T=R(2)T=R(0)T=2.4m?,X(1)T=X(2)T=X(0)T=15.05m?。生態(tài)電站廠用變壓器的計算阻抗:RT=5.6m?,Ur%=0.946,Ux%=3.85,XT=19.6m?。由于是Dyn11接線,所以:R(1)T=R(2)T=R(0)T=5.6m?,X(1)T=X(2)T=X(0)T=19.6m?。變壓器的相保電阻及相保電抗可按下式計算:得:長引水電站廠用變壓器的相保電阻及相保電抗R?PT大=2.4m?,X?PT大=15.05m?。生態(tài)電站廠用變壓器的相保電阻及相保電抗R?PT小=5.6m?,X?PT小=19.6m?。電纜阻抗值計算公式:查《民用建筑電氣設計手冊》及《SL585-2012水利水電工程三相交流系統(tǒng)短路電流計算導則》,的低壓線路的阻抗的有名值為:每根線路單位長度的電阻值RL0=RφL0=RPL0=Cj××103÷S(m?/m)單相對地短路用的單位長度相保電阻值(零序電阻)則取RφPL0=1.5(RφL0+RPL0)式中,Cj—絞入系數(shù),導線截面為6mm2時,Cj為1;導線截面>6mm2時,Cj為1.2,銅芯導線的=0.0172(?·mm2/m)6、三相及單相短路電流計算公式:I(3)DK=CVm/(∑Z∑KT+∑Z∑KL);I(1)DK=CVm×/(∑Z?PT+∑ZφPL0)。式中:C:電壓系數(shù),大系統(tǒng)是為1.05,小系統(tǒng)取0.95Vm為相電壓,取標要基準制230V。7、電站廠用電故障電流值查表得電纜的相阻抗值、相保阻抗值如下(單位:m?/m)導線截面3001501209570503525161064相電阻值0.0590.1170.1460.1850.2510.3510.5010.7021.0971.7542.8674.300相保電阻值SP=S0.1750.3510.4380.5550.7531.0531.5032.1063.2915.2628.60112.900相電抗值SP=S0.0660.0770.0760.0770.0780.0790.0800.0800.0820.0850.0920.097相保電抗值SP=S0.170.1360.1400.1380.1380.1400.1460.1460.1640.1760.1860.196電纜截面3×300-1×1503×150-2×703×120-2×703×95-2×503×70-2×353×50-2×253×25-2×165×165×105×65×4相電阻值0.0590.1170.1460.1850.2510.3510.7021.0971.7542.8674.300相電抗值0.0660.0770.0760.0770.0780.0790.0800.0820.0850.0920.097相保電阻值0.2630.6420.5960.8041.1281.582.6993.2915.2628.60112.900相保電抗值0.170.1360.1400.1380.1380.1400.1460.1640.1760.1860.196SP=S0.170.1550.1530.1630.1630.1770.1820.1980.2190.219SP≈S/2相阻抗值0.08850.1400.1650.2000.2630.360.7071.101.7562.8684.301相保阻抗值0.3130.6600.6150.8201.141.592.7053.2955.2658.60312.901注:以下計算:當電阻值>>10倍電抗值時,忽略電抗的影響。同理,(電抗值)>>10倍電阻值時,忽略電抗電阻的影響。長引水電站廠用電盤各負荷故障電流計算表(廠用電2#)(變壓器阻抗值:RT=2.4m?,XT=15.05m?,相保阻抗值:R?PT大=2.4m?,X?PT大=15.05m?)

序號1234567891011121314151617181920212223負荷名稱進線柴油發(fā)電機中控動力屏直流電源(1.1)直流電源(2.1)消防泵柜(主供)通信室動力(主供))檢修滲漏排水泵備用1備用22#機旁動力屏技術控水主變檢修動力箱電纜層照明電纜層檢修空調電源備用1備用2中低壓空壓機蝸殼照明蝸殼檢修水輪機層照明水輪機層檢修電纜型號(ZB-YJV-0.6/1KV—)3×300-1×1503×50-2×255×165×163×150-2×703×25-2×163×120-2×703×95-2×502×(3×150-2×70)3×25-2×165×63×25-2×163×25-2×163×70-2×355×63×25-2×165×63×25-2×16電纜長度158511011050954525455550501006060556060電纜相阻抗值(m?)0.885+j0.9929.835+j6.715120.67+j9.02120.67+j9.025.85+j3.8566.69+j7.66.57+j3.424.625+j1.9252.655+j1.73338.61+j4.4143.35+j4.635.1+j470.2+j815.06+j4.68172.02+j5.5238.61+j4.4172.02+j5.5242.12+j4.8三相短路計算阻抗(m?)1.125+j16.0432.235+j21.765123.07+j24.07123.07+j24.078.25+j18.969.09+j22.658.97+j18.477.025+j16.9755.055+j16.78341.01+j19.45145.75+j19.6537.5+j19.0572.6+j23.0517.46+j19.73174.42+j20.5741.01+j19.41174.42+j20.5744.52+j19.85電纜相保阻抗值(m?)3.945+j2.55134.3+j15.045362.01+j18.04362.01+j18.0432.1+j7.75256.405+j19.2926.82+j6.320.1+j4.0758.303+j3.488148.45+j10.01430.05+j9.3134.95+j9.1269.9+j18.267.68+j9.78516.06+j11.16148.45+j10.01516.06+j11.16161.94+j21.84單相接地計算阻抗(m?)6.345+j17.60136.7+j30.095364.41+j33.09364.41+j33.0934.5+j22.8228.805+j34.3429.22+j21.3522.5+j19.12510.703+j18.538150.85+j25.06432.45+j24.35147.35+j24.15272.3+j33.2570.08+j24.83518.46+j26.21150.85+j25.06518.46+j26.21164.34+j36.89I(3)DK(kA)13.6825.6561.7541.75410.6683.025810.71411.97512.5524.8471.4965.2302.8888.3501.2534.8491.2534.513I(1)DK(kA)11.7591.5720.6010.6015.320.95086.0797.45010.2781.4390.5091.4730.8022.9590.4241.4200.4241.306

序號24252627282930313233負荷名稱備用1備用21#機盤動力屏送風機動力副廠房、主機間照明母線電纜層照明母線層檢修1#主變電源軸流風機備用1備用2電纜型號(ZB-YJV-0.6/1KV—)3×95-2×505×165×65×63×25-2×165×165×10電纜長度25654045305510電纜相阻抗值(m?)4.625+j1.92571.305+j5.3343.88+j3.28129.02+j4.1421.06+j2.460.34+j4.5117.54+j0.85三相短路計算阻抗(m?)7.025+j16.97573.405+j20.0846.28+j18.33131.42+j19.1923.46+j17.4562.74+j19.5619.94+j15.90電纜相保阻抗值(m?)20.1+j3.45213.92+j10.66131.643+j6.56387.05+j8.3780.97+j5.46181.01+j9.0252.62+j1.76單相接地計算阻抗(m?)22.50+j18.50216.32+j25.71134.043+j21.61389.45+j23.4283.37+j20.51183.41+j24.0755.02+j16.81I(3)DK(kA)11.9752.8914.4201.6567.5243.3488.626I(1)DK(kA)7.5531.0101.6200.5642.5621.1893.824長引水電站廠用電盤各負荷故障電流計算表(廠用電1#)(變壓器阻抗值:RT=2.4m?,XT=15.05m?,相保阻抗值:R?PT大=2.4m?,X?PT大=15.05m?)

序號1234567891011121314151617181920212223負荷名稱進線中控動力屏直流電源(1.2)直流電源(2.2)消防泵柜(主供)通信室動力(主供))油處理室控制柜備用1備用2技術控水檢修滲漏泵橋機電源1#-3#事故照明箱主變及中控室照明箱副廠房照明戶外照明2#主變電源1#機旁動力屏中低壓空壓機EL563.1副廠房照明箱EL563.1副廠房檢修箱安裝主機間照明主機間檢修電纜型號(ZB-YJV-0.6/1KV—)3×50-2×255×165×163×150-2×703×25-2×163×70-2×352×(3×150-2×70)3×120-2×703×150-2×703×6(每相)5×65×65×63×25-2×163×95-2×503×70-2×355×63×25-2×165×103×50-2×25電纜長度80105105459065505012070、90、90125808555255565358570電纜相阻抗值(m?)28.08+j6.32115.185+j8.61115.185+j8.615.265+j3.46563.18+j7.216.315+j5.072.95+j1.9267.3+j3.814.04+j9.24258.03+j8.28358.375+j11.5229.36+j7.36243.695+j7.8238.61+j4.44.625+j1.92513.805+j4.29186.355+j5.9824.57+j2.8149.09+j7.22524.57+j5.53三相短路計算阻抗(m?)30.48+j21.37117.585+j23.66117.585+j23.667.665+j18.51565.58+j22.2518.715+j20.125.35+j16.9769.7+j18.8516.44+j24.29260.43+j23.33360.775+j26.55231.76+j22.41246.095+j22.8741.01+j19.457.025+j16.97516.205+j19.34188.755+j21.0326.97+j17.85151.49+j22.27526.97+j20.58電纜相保阻抗值(m?)126.4+j14.16345.555+j17.22345.555+j17.2228.89+j6.975242.91+j16.3873.32+j10.5959.226+j3.87629.8+j7.6577.04+j18.6774.09+j16.741075.13+j23.25688.08+j14.88731.085+j15.81148.45+j10.0120.1+j4.07562.04+j8.965559.065+j12.0994.465+j6.37447.27+j14.96110.6+j12.39單相接地計算阻抗(m?)128.8+j29.21347.955+j32.07347.955+j32.0731.29+j22.025245.31+j31.4175.72+j25.64511.626+j18.92632.2+j22.7079.44+j33.65776.49+j31.791077.53+j38.30670.48+j29.93733.485+j30.86150.85+j25.0622.5+j19.12564.44+j24.02561.465+j27.1496.865+j21.42449.67+j30.01113.0+j27.44I(3)DK(kA)5.9101.8341.83410.9793.1778.00612.36010.3787.5010.841(最小值)0.6090.9480.8914.84911.9758.7191.1586.8021.4376.484I(1)DK(kA)1.6660.6300.6305.7500.8902.7529.9055.5842.5510.283(最小值)0.2040.3280.3001.4207.4503.1990.3912.2180.4881.892

序號242526272829303132333435負荷名稱GIS室檢修備用1備用22#機盤動力屏送風機動力尾水門動力屏啟閉機室照明安裝間檢修GIS室動力GIS室照明備用1備用2電纜型號(ZB-YJV-0.6/1KV—)3×50-2×253×95-2×505×163×70-2×355×63×120-2×705×165×6電纜長度603060120140906080電纜相阻抗值(m?)21.06+j4.749.25+j3.8565.82+j4.9230.12+j9.36401.38+j12.8813.14+j6.8465.82+j4.92229.36+j7.36三相短路計算阻抗(m?)23.46+j19.7911.65+j18.9068.22+j19.9732.52+j24.41403.78+j27.9315.54+j21.8968.22+j19.97231.76+j22.41電纜相保阻抗值(m?)94.8+j10.6240.2+j8.15197.46+j9.84135.36+j19.561204.14+j26.0453.64+j13.77197.46+j9.84688.08+j14.88單相接地計算阻抗(m?)97.2+j25.6742.6+j23.2199.86+j24.89137.76+j34.611206.54+j41.0956.04+j28.82199.86+j24.89670.48+j29.93I(3)DK(kA)7.1689.9093.0955.410.5458.1953.0950.949I(1)DK(kA)2.1884.5351.0921.54880.1803.4911.0920.328生態(tài)電站廠用電盤各負荷故障電流計算表(變壓器阻抗值:RT=5.6m?,XT=19.6m?,相保阻抗值:R?PT小=5.6m?,X?PT?。?9.6m?)

序號1234567891011121314151617181920212223負荷名稱進線生態(tài)電站柴油機房中控室照明蝸殼檢修蝸殼照明發(fā)電機層檢修機旁盤1APs機旁盤2APs消防泵控制柜低壓空壓機檢修滲漏泵油處理室控制柜尾水門機風機動力箱空調電源橋機電源EL588副廠房照明水輪機層檢修水輪機層照明3#主變動力箱3#主變檢修直流充電第一電源1#—3#事故照明箱電纜型號(ZB-YJV-0.6/1KV—)3×95-1×505×63×25-2×165×63×25-2×163×50-2×253×50-2×255×163×25-2×163×70-2×355×165×165×165×163×50-2×255×103×25-2×165×105×163×25-2×165×163×6(每相)電纜長度25305050251010503060705010453525353515153525、55、30電纜相阻抗值(m?)4.625+j1.92586.1+j2.7635.1+j4143.35+j4.617.55+j23.51+j0.793.51+j0.7954.85+j4.121.06+j2.415.06+j4.6876.79+j5.7454.85+j4.110.97+j0.8249.365+j3.6912.285+j2.76543.85+j2.12524.57+j2.861.39+j2.97516.455+j1.2310.53+j1.238.395+j2.87---三相短路計算阻抗(m?)10.225+j21.52591.7+j22.3640.7+j23.6148.95+j24.223.15+j21.69.11+j20.399.11+j20.3960.45+j23.726.66+j22.020.66+j24.2882.39+j25.3460.45+j23.716.57+j20.4254.965+j23.2917.885+j22.36549.45+j21.72530.17+j22.466.99+j22.57522.055+j20.8316.13+j20.843.995+j22.47電纜相保阻抗值(m?)20.1+j4.075258.03+j5.58134.95+j9.1430.05+j9.367.425+j4.5515.8+j1.7715.8+j1.77165.55+j8.280.91+j5.4667.68+j9.78231.77+j11.48165.55+j8.232.91+j1.64148.995+j7.3855.3+j6.195131.55+j4.494.465+j6.37184.17+j6.1649.365+j2.4640.485+j2.73115.185+j5.74473.055+j10.23單相接地計算阻抗(m?)25.7+j23.675263.63+j25.18140.55+j24.7435.65+j24.973.025+j24.1521.4+j21.3721.4+j21.37171.15+j27.886.51+j25.0663.18+j29.38237.37+j31.08171.15+j27.838.51+j21.24154.595+j26.9860.9+j25.795137.15+j24.00100.065+j25.97189.77+j25.7654.965+j22.0646.085+j22.33120.785+j25.34478.655+j29.83I(3)DK(kA)11.9752.3314.6761.4586.9489.8519.8513.3886.3646.9002.5523.3888.3653.6857.6824.0735.8543.1127.2518.3584.453---I(1)DK(kA)7.5530.8341.5420.5042.867.2747.2741.2682.4423.1570.9191.2695.0021.4013.3261.582.1281.1483.7144.2961.7820.459

序號2425262728293031323334負荷名稱備用1備用2直流充電第二電源中控室動力安裝間檢修安裝間主機間照明EL595.0副廠房照明EL604.60副廠房照明戶外照明技術供水動力箱備用電纜型號(ZB-YJV-0.6/1KV—)5×163×25-2×163×50-2×255×65×65×65×65×10電纜長度3535506010204520電纜相阻抗值(m?)38.395+j2.8724.57+j2.817.55+j3.95172.02+j5.5228.67+j0.9257.34+j1.84129.015+j4.1435.08+j1.7三相短路計算阻抗(m?)43.995+j22.4730.17+j22.423.15+j23.55177.62+j25.1234.27+j20.5262.94+j21.44134.615+j23.7440.68+j21.3電纜相保阻抗值(m?)115.185+j5.7494.465+j6.3779+j8.85516.06+j11.1686.01+j1.86172.02+j3.72387.045+j8.37105.24+j3.52單相接地計算阻抗(m?)120.785+j25.34100.065+j25.9784.6+j28.45521.66+j30.7691.61+j21.46177.62+j23.32392.645+j27.97110.84+j23.12I(3)DK(kA)4.4535.8546.6621.2265.5073.3081.6094.791I(1)DK(kA)4.4532.1282.2640.4212.3381.2280.5591.9438、7月28日故障情況分析2017年7月28日晚上19時37分,長引水電站1#廠用變動作,切Ⅰ段廠用電進線開關及10kV高壓側開關,查看廠用電保護盤,系廠用電零序保護動作,動作電流值顯示在3I0=2.375A,折算到400V側為:2.375×400=950A,由于廠用電保護的故障量未接入故障錄波系統(tǒng),所以具體動作電流值只能見保護盤。下面具體分析之:查《長引水電站廠用電盤各負荷故障電流計算表(廠用電1#)》,得到主變檢修箱的相保電阻值為:150.85+j25.06(m?),得在配電箱處金屬性單相接地短路電流I(1)dk≈1.4(kA),比此時的短路電流略大。顯然,這種短路不是全金屬性短路。在主變檢修動力箱的保護整定:熱電流保護為額定電流100A,動作時間與流過開關的電流值及開關是否為熱狀態(tài)有關,查ABB開關動作特性,當流過的短路電流為950A時,支路In=63A的開關,在冷狀態(tài)下的開關固有動作時間在0.2s及以上。而廠用變零序保護的動作時間整定為0s,故障電流也達到動作值,所以廠用變零序保護動作(應該指出,進線開關及廠用負荷開關未對保護進行整定,所以這些開關的保護也未動作,擴大了保護動作范囲)。9、長引水電站0.4kV廠用電柜、機組用電柜及溢洪道0.4kV柜出線開關保護整定保護設定說明:(1)全面采用開關原有的保護功能。(2)未標明的負荷盤(箱)的進線開關(指3P開關)的TMD熱門限可調的選擇開關設在“MED”位置(即熱保護動作門檻值為0.9In),開關自身的I3磁脫口保護(10In)不可調。負荷盤(箱)的出線開關的TMD熱門限可調的選擇開關設在“MIN”位置(即熱保護動作門檻值為0.7In),開關自身的I3磁脫口保護(10In)不可調。(3)長引水電站技術供水考慮2臺泵同時啟動。(4)長引電站的中、低壓機考慮各一臺同時啟動。(5)由于電站的異步電動機在10kW及以上都采用了軟啟動裝置,故啟動倍數(shù)按4倍電動機額定定電流考慮。(6)過負荷保護整定:Idz≥1.3Ijs(或1.5In,In-電動機額定電流),動作時間:約15s。(7)對T2S160系列開關配PR221DS裝置的過載保護在(0.4~1)In選擇,過流反時限保護6In的時間6s。(8)對照明配電箱的T2S160一律采用瞬時保護方式(即“I”方式),保護整定:Idz≥4~7Ijs(或6In,In-電動機額定電流),動作時間:查曲線約為0.01s(當故障電流>Idz時,開關動作時間縮短)。中性線保護投入,定值為50%。(9)對T4、T5配PR221DS裝置的系列開關,過載保護在(0.4~1)In選擇,過流反時限保護6In的時間6s。除長引水電站的機盤用電采用短延時保護外,其余都采用瞬時保護方式(即“I”方式),保護整定:Idz≥4~7Ijs(或6In,In-電動機額定電流),動作時間:查曲線約為0.01s(當故障電流>Idz時,開關動作時間縮短)。中性線保護投入,定值為50%。(10)由于機組用電盤有備用電源自動切換裝置,為了保證故障的選擇性,廠用電機盤用電采用短延時保護,延時0.2s。(11)進線保護設置1)長引電站總統(tǒng)計同時啟動運行計算負荷計算為550kW(主要是幾個大型電動機如:離心泵、檢修滲漏泵、橋機、中、低壓機等功率統(tǒng)計),生態(tài)電站總統(tǒng)計同時啟動運行計算負荷計算為150kW(考慮同上)2)長引水電站:過載長延時整定(L):0.84×In(延時約6s),短路短延時整定(S):(可關斷):2×In(延時約0.6s),反時限:K=(2×In)2×0.8,短路瞬動整定(I):(可關斷):6×In,接地故障整定(G):(可關斷):0.5×In(延時約0.4s)級差為0.05s,反時限:k=t。剩余電流保護(Rc)(如有):Id=30A,td=4s;超溫保護投入;相不平衡保護(U):停用。3)生態(tài)電站:長引水電站:過載長延時整定(L):0.72×In(延時約3s),短路短延時整定(S):2×In(延時約0.4s),反時限:K=(2×In)2×0.6,短路瞬動整定(I):(可關斷):6×In,接地故障整定(G)::0.56×In(延時約0.35s)級差為0.05s,反時限:k=t。剩余電流保護(Rc)(如有):Id=25A,td=4s;超溫保護投入;相不平衡保護(U):停用。4)長引電站聯(lián)絡柜:0.84×In(延時約3s),短路短延時整定(S):(可關斷):2×In(延時約0.4s),反時限:K=(2×In)2×0.8,短路瞬動整定(I):(可關斷):6×In,接地故障整定(G):(可關斷):0.5×In(延時約0.25s)級差為0.05s,反時限:k=t。剩余電流保護(Rc)(如有):Id=30A,td=3s;超溫保護投入;相不平衡保護(U):停用。(12)原廠自用電保護定值單中的“低壓零序過流”動作時間有“0s”改為“0.6s”。(13)閘門饋線保護(在中壓柜上)的低壓過流1段時限由“0.3s”改為“0.5s”。過流Ⅱ段電流時限由“1s”改為“1.5s”。長引水電站廠用電Ⅱ段.4kV動力柜出線開關保護整定

序號1234567891011121314151617負荷名稱進線柴油發(fā)電機中控動力屏直流電源(1.1)直流電源(2.1)消防泵柜(主供)通信室動力(主供)檢修滲漏排水泵備用1備用22#機旁動力屏技術供水控制屏主變檢修動力箱電纜層照明電纜層檢修空調電源備用1開關型號規(guī)格E1N1250T5S630+MONT2S160T2S160T2S160T5S400+MONT2S160T4S250T2S160T2S160T4S250T5S630T2S160T2S160T2S160T2S160T2S160開關額定電流1250A630A160A63A63A400100A250A63A160A250A630A100A25A100A100A100A計算電流910A360A90A40A40A234A45A198A160A423A54A4A54A60A脫扣器型號PR122/P-LSIGPR222DS/P-LSIGPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/I過載保護整定值見保護設定第(11)項0.60×In(延時約90s)0.6×In(延時約80s)0.68×In(延時約80s)0.68×In(延時約80s)0.68×In(延時約80s)0.68×In(延時約80s)0.72×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)0.6×In(延時約80s)0.72×In(延時約80s)0.88×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.68×In(延時約80s)0.88×In(延時約80s)短時限保護整定值2.5×In(延時約1s)6×In(延時約0.1s)6×In(延時約0.2s)短時限保護反時限0.1s瞬時保護4×In5.5×In6×In6×In4×In2.5×In4×In6×In6×In3.5×In4×In4×In4×In4×In中性線保護50%(注:設置開關選“手動”)50%50%50%

序號1819202122232425262728293031323334負荷名稱備用2中低壓空壓機蝸殼照明蝸殼檢修水輪機層照明水輪機層檢修備用1備用21#機盤動力屏送風機動力副廠房、主機間照明母線電纜層照明母線層檢修1#主變電源軸流風機備用1備用1開關型號規(guī)格T4S250T4S250T2S160T2S160T2S160T2S160T4S400T2S160T4S250T2S160T2S160T2S160T2S160T2S160T2S160T4S250T2S160開關額定電流250A250A25A100A25A100A400A160A250A100A25A25A100A100A63A250A160A計算電流129A1.67A54A4.7A54A160A40A6.5A0.8A54A36A20A脫扣器型號PR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/I過載保護整定值0.88×In(延時約80s)0.56×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.8×In(延時約80s)0.8×In(延時約80s)0.6×In(延時約80s)0.6×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.72×In(延時約80s)0.52×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)短時限保護整定值6×In(延時約0.1s)短時限保護反時限瞬時保護4×In4×In4×In4×In4×In4×In4×In5.5×In3.5×In4×In4×In4×In4×In4×In5×In5×In中性線保護50%50%50%50%長引水電站廠用電Ⅰ段.4kV動力柜出線開關保護整定

序號123456789101112131415161718負荷名稱進線中控動力屏直流電源(1.2)直流電源(2.2)消防泵柜(主供)通信室動力(主供)油處理室控制柜備用1備用2技術供水檢修滲漏泵橋機電源1#-3#事故照明箱主變及中控室照明箱副廠房照明戶外照明2#主變電源1#機旁動力屏開關型號規(guī)格E1N1250T2S160T2S160T2S160T5S400+MONT2S160T2S160T2S160T2S160T5S630T4S250T4S250T2S160T2S160T2S160T2S160T2S160T4S250開關額定電流1250A160A63A63A400100A160A63A160A630A250A250A25A100A25A25A100A250A計算電流910A90A40A40A234A45A119A423A198A202A17A9.3A5.6A10.4A36A160A脫扣器型號PR122/P-LSIGPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/I過載保護整定值見保護設定第(11)項0.68×In(延時約80s)0.68×In(延時約80s)0.68×In(延時約80s)0.68×In(延時約80s)0.68×In(延時約80s)0.80×In(延時約80s)0.8×In(延時約80s)0.8×In(延時約80s)0.72×In(延時約80s)0.72×In(延時約80s)0.88×In(延時約80s)0.8×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.56×In(延時約80s)0.6×In(延時約80s)短時限保護整定值6×In(延時約0.1s)短時限保護反時限瞬時保護4×In6×In6×In4×In2.5×In6×In5.5×In5.5×In3.5×In4×In4×In4×In4×In4×In4×In4×In中性線保護50%50%50%

序號20212223242526272829303132333435負荷名稱中低壓空壓機EL563.1副廠房照明箱EL563.1副廠房檢修箱安裝主機間照明主機間檢修GIS室檢修備用1備用22#機盤動力屏送風機動力尾水門動力屏啟閉機室照明安裝間檢修GIS室動力GIS室照明備用1備用2開關型號規(guī)格T4S250T2S160T2S160T2S160T2S160T2S160T2S160T2S160T4S250T2S160T2S160T2S160T4S250T2S160T2S160T2S160T2S160開關額定電流250A25A100A25A160A100A100A160A250A100A160A25A250A100A25A25A160A計算電流129A4A54A18.4A90A36A160A40A100A4.5A180A36A4.5A脫扣器型號PR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/I過載保護整定值0.60×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.56×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)0.6×In(延時約80s)0.44×In(延時約80s)0.8×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.52×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)短時限保護整定值6×In(延時約0.1s)短時限保護反時限瞬時保護4×In4×In5×In4×In5×In4×In5×In5×In5×In5×In4×In8×In4×In4×In5×In5×In中性線保護50%50%50%生態(tài)電站廠用電.4kV動力柜出線開關保護整定

序號1234567891011121314151617負荷名稱進線生態(tài)電站柴油機房中控室照明蝸殼檢修蝸殼照明發(fā)電機層檢修機旁盤1APs機旁盤2APs消防泵控制柜低壓空壓機檢修滲漏泵油處理室控制柜尾水門機風機動力箱空調電源橋機電源EL588副廠房照明開關型號規(guī)格EIN800T4S250+MONT2S160T2S160T2S160T2S160T2S160+YUT2S160+YUT2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160開關額定電流63040025A100A25A100A125A125A63A100A160A100A100A63A100A160A25A計算電流445180A2.79A54A1.34A54A108A108A22A65A108A40A27A8A29A90A3.3A脫扣器型號PR122/P-LISGPR221DS-LSIGPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/I過載保護整定值見保護設定第(11)項0.52×In(延時約90s)0.4×In(延時約80s)0.88×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)0.6×In(延時約80s)0.68×In(延時約80s)0.72×In(延時約80s)0.6×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.68×In(延時約80s)0.4×In(延時約80s)短時限保護整定值2.5×In(延時約1s)6×In(延時約0.2s)6×In(延時約0.2s)短時限保護反時限0.1s瞬時保護4×In4×In5×In4×In5×In3×In5×In4×In3×In3×In3×In2×In4×In4×In50%(注:設置開關選“手動”)

序號1820202122232425262728293031323334負荷名稱水輪機層檢修水輪機層照明3#主變動力箱3#主變檢修直流充電第一電源1#—3#事故照明箱備用1備用2直流充電第二電源中控室動力安裝間檢修動力箱安裝間主機間照明EL595.0副廠房照明EL604.60副廠房照明戶外照明技術供水動力箱備用開關型號規(guī)格T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160開關額定電流100A25A100A100A63A25A25A160A63A100A160A25A25A25A25A63A100A計算電流54A3.35A36A54A27A10.32A27A54A90A15A4.93A2.33A9.1A6A脫扣器型號PR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/IPR221DS-LS/I過載保護整定值0.88×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)0.44×In(延時約80s)0.52×In(延時約80s)0.88×In(延時約80s)0.88×In(延時約80s)0.52×In(延時約80s)0.68×In(延時約80s)0.88×In(延時約80s)0.68×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.4×In(延時約80s)0.88×In(延時約80s)短時限保護整定值短時限保護反時限瞬時保護6×In4×In4×In4×In4×In4×In5×In5×In4×In4×In5×In4×In4×In4×In4×In4×In4×In長引水電站機1#組動力盤出線開關保護整定(3P開關)

序號1234567891011121314151617負荷名稱1#發(fā)電機輔助控制箱2#發(fā)電機輔助控制箱1#機調速器油壓裝置2#機調速器油壓裝置1#機蝶閥控制柜2#機蝶閥控制柜1#漏油泵1#機勵磁調節(jié)器2#機勵磁調節(jié)器頂轉子油泵電機試壓泵(1#)電機試壓泵(2#)1#機勵磁變測溫儀備用3備用4備用5備用6開關型號規(guī)格T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160開關額定電流63A63A40A40A63A63A16A16A16A6.3A16A16A16A25A63A40A16A計算電流40A40A22A22A40A40A3A5.5A5.5A3A7A7A9A脫扣器型號TMDTMDTMDTMDTMDTMDTMDTMDTMDMAMAMATMDTMDTMDTMDTMD過載保護整定值MENMENMENMENMENMENMINMINMINMENMENMENMENMEN瞬時保護10In10In10In10In10In10In10In10In10InMENMENMENMENMEN長引水電站機2#組動力盤出線開關保護整定(僅限3P開關)

序號1234567891011121314負荷名稱1#發(fā)電機輔助控制箱2#發(fā)電機輔助控制箱1#機調速器油壓裝置2#機調速器油壓裝置1#機蝶閥控制柜2#機蝶閥控制柜2#漏油泵1#機勵磁調節(jié)器2#機勵磁調節(jié)器2#機組PMU屏2#機組在線監(jiān)測2#機勵磁變測溫備用2備用6開關型號規(guī)格T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160T2S160開關額定電流63A63A40A40A63A63A16A16A16A16A16A16A16A16A計算電流40A40A22A22A40A40A3A5.5A5.5A5A5A9A脫扣器型號TMDTMDTMDTMDTMDTMDTMDTMDTMDTMDTMDTMDTMDTMD過載保護整定值MENMENMENMENMENMENMINMINMINMINMINMENMENMEN瞬時保護10In10In10In10In10In10In10In10In10In10In10In10In10In10In生態(tài)電站機1#組動力盤出線開關保護整定(3P開關)

序號1234567891011121314151617負荷名稱進線電源1#發(fā)電機輔助控制箱2#發(fā)電機輔助控制箱1#機調速器油壓裝置2#機調速器油壓裝置1#機蝶閥控制柜2#機蝶閥控制柜1#漏油泵1#測溫制動屏1#消防控制柜1#機組LCU柜1#發(fā)電機保護屏1#調速器電氣機械一體化柜1#勵磁調節(jié)器1#發(fā)電機端子箱1#水輪機

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